I will say one thing for Mexicans - one thing they DON'T do as much, is give their kids phones, at restaurants, to shut them up.

I was thinking approvingly of this, as I first noticed it. Then I saw a family with 2 kids in a restaurant, and both of the kids (around age 7 and 9) were watching 2 separate upright large tablets, and had their plates in front of the tablet.

I thought, disappointed, "well, so much for the whole 'Mexican's don't sedate their kids with screen time' theory".

But then I heard this family talking. And though they looked Mexican, they had obviously been in the US their whole lives, because they had zero accent.

So my theory stands. For the time being, anyway. There's still tons and tons of phone usage, just that particular case seems to be less common.